ČSN EN IEC 61788-17 ED.2   (345685) Supravodivost - Část 17: Elektronická měření charakteristických vlastností - Místní kritická hustota proudu a její rozdělení ve velkoplošných supravodivých vrstvách

Anotace textu normy ČSN EN IEC 61788-17 ED.2   (345685)

This part of IEC 61788 specifies the measurements of the local critical current density (Jc) and its distribution in large-area high-temperature superconducting (HTS) films by an inductive method using third-harmonic voltages. The most important consideration for precise measurements is to determine Jc at liquid nitrogen temperatures by an electric-field criterion and obtain current-voltage characteristics from its frequency dependence. Although it is possible to measure Jc in applied DC magnetic fields [20] [21], the scope of this document is limited to the measurement without DC magnetic fields.